<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <style>
        .float-buttons {
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 10px;
            background: rgba(255, 255, 255, 0.9);
            padding: 10px 20px;
            border-radius: 50px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            z-index: 9999;
        }
        
        .float-btn {
            background: #4CAF50;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 14px;
            transition: background 0.3s;
        }
        
        .float-btn:hover {
            background: #45a049;
        }
    </style>
</head>
<body>
    <div class="float-buttons">
        <button class="float-btn" onclick="history.back()">上一页</button>
        <button class="float-btn" onclick="location.href='/'">首页</button>
        <button class="float-btn" onclick="location.reload()">刷新</button>
    </div>
</body>
</html>
